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class=time>08-01-11 23:00:28　　　《济南日报》　　　</div>  <div class=key>关键词：<a href='/List.aspx?chid=14&Keyword=%e5%8c%96%e9%aa%8c&FieldName=tagnamestr' target='_blank'>化验</a> <a href='/List.aspx?chid=14&Keyword=%e9%85%8d%e5%90%88&FieldName=tagnamestr' target='_blank'>配合</a></div>  <div class=daodu>化验在医学上属于实验诊断学，是诊断疾病的重要检查方法，科学性很强，从标本到实验都有严格的要求，任何一个环节把握不好，都会影响结果�?/div>  <div class=geyan><label><span>健康谚语</span></label></div>  <div class=concent fang=08-01-11 23:00:28> <p>去医院看病，医生除了询问病人的病史、给予必要的体格检查之外，有时还要让病人去做一些化验检查。所以需要化验者就医时一定要注意以下几点�?br /> <br /> 1、化验时间，一般以上午为好。因为，机体经过一夜的休息后，体内的各种物质成分含量还处在相对衡定的水平。此外，复查化验也最好在每次同一时间进行�?<br /> <br /> 2、尿液化验，以清晨第一次尿最好，因为尿液在体内经过一夜的沉积或浓缩，病理物质的浓度相对增高，易被检出�?br /> <br /> 3、一般静脉取血的化验项目都要求空腹，因为进食后各种营养物质先后被吸收进入血液，从而改变了它们在血液中的含量。不同物质被吸收的速度和时间也不相同。如血糖在饭后半小时含量最高，4小时才恢复到空腹水平。而血脂在饭后4小时含量最高，8�?2小时才降到空腹水平�?<br /> <br /> 4、注意饮食。化验血或尿前，勿过多饮水，饮水过多可使血液和尿液稀释，导致结果偏低。有些食物在化验前不能食用。如查血脂和肝功能前不宜食用高脂肪食物，查大便潜血前不能食用动物血、肉、肝或富含叶绿素的蔬菜以及铁剂和中药等。因为，这些食品会使检验结果呈现假阳性。查尿糖前则不宜多服具有还原性质的药品，如维生素C、水杨酸类及链霉素等，因这类药物可导致尿糖试验假阳性结果�?<br /> <br /> 5、把握好检查时机。有的疾病的病理特征不是在整个病程都存在的，而是在疾病的某一期间才能反应出来。如风湿病、结核病在活动期时，化验的阳性率才高。肠道寄生虫病要在虫体排卵期才能查出虫卵。遇有这种情况就不能凭一次化验结果肯定或否定某种疾病的存在�?<br /> <br /> 可见，化验者应该认真按照医生嘱咐的注意事项做好化验前的准备，只有这样才能得到准确的化验结果，给诊断提供真实的参考依据�?/p> <p> </p> </div>  <div class=next> <p><a href="/renai/zhinan/19833.html">何时矫牙最合�?/a></p> <p><a href="/renai/zhinan/19835.html">怀疑有医疗问题应该怎么�?/a></p> </div>  <div class=fanhui><a href="http://www.whrenai.com"><img src="http://images.whrenai.com/news_images/back.gif" width="180" height="34" border="0" /></a><a href="http://dgt.zoosnet.net/LR/Chatpre.aspx?id=DGT13232427" target="_blank"><img src="http://images.whrenai.com/news_images/zx1.gif" width="80" height="34" border="0" /></a><a href="http://wpa.qq.com/msgrd?V=1&Uin=179832679&Site=互动服务&Menu=yes" target="_blank"><img 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�?!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 化验要准�?关键是配�?/title> <meta name="keywords" content="<a href='/List.aspx?chid=14&Keyword=%e5%8c%96%e9%aa%8c&FieldName=tagnamestr' target='_blank'>化验</a> <a href='/List.aspx?chid=14&Keyword=%e9%85%8d%e5%90%88&FieldName=tagnamestr' target='_blank'>配合</a>,化验要准�?关键是配�?就医指南" /> <meta name="description" content=" 化验在医学上属于实验诊断学，是诊断疾病的重要检查方法，科学性很强，从标本到实验都有严格的要求，任何一个环节把握不好，都会影响结果�? /> <link href="http://images.whrenai.com/news_images/new_css.css" rel="stylesheet" type="text/css"> <SCRIPT src="http://images.whrenai.com/by_images/showFlash.js"></SCRIPT> <script type="text/javascript" language="javascript" src="http://images.whrenai.com/js/copy.js "></script> <SCRIPT src="http://images.whrenai.com/by_images/showFlash.js"></SCRIPT> <script language="javascript" src="http://images.whrenai.com/zx.js"></script> <script language='javascript' src='/js/Page.js'></script> <script 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